"Do i take it then i can not adjust the fan limits within OMSA? I know you cant adjust the speed of the fans but i thought you can change the thresholds?"
You can change the thresholds, but all that means is that you change the point at which a warning or error is triggered (for example, if you will be running the server in temps you KNOW are not the norm and don't want to be bothered with constant warning/error notifications) ... it does not actually affect the fan operation (including speed).